software design is to solve a problem and to plan for software solution. In software design, we need to understand usability of software design. Usability is kind of website or software application that use to measure of the interactive user experience associated with a user interface. user interface design is help the users to do their tasks, achieve their goals, easy to learn and also can give satisfaction when the users use it.
an interface usability test by invite the users to participate during testing session. the purpose of this testing is to get to know any difficulties that user face such as confusion, frustration and satisfaction when they use it. so, we are able to see weather our system is successful or not. Usability depends on the users need to their task and to achieve their objectives. the reason is because we create the system is to use by users.
User Center design need in software or web application because UCD is the one who answer the questions about users, their tasks, goals and approach for employing usability. likewise, they will involve the users in order to develop their Web site so that they can meet the users need. UCD is focus on usability goals, user characteristics, environment, tasks, and
workflow in the design of an interface.
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